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Inclined dislocations in apophyllite crystals
Published/Copyright:
July 28, 2010
Abstract
A large number of perfect (001) cleavages were obtained by cleaving natural apophyllite crystals. By etching such cleavages in ammonium bifluoride solution it is established that the pits indicate the sites of dislocations in the crystals. This is further confirmed by comparing the etch patterns on matched cleavage surfaces. Eccentricity of the pits has been attributed to the inclined nature of dislocations. Existence of parallel dislocations seems to be due to the purity of the crystal. These observations are verified by comparing etch patterns produced on opposite faces of a thin flake (0.032 mm thick) and also by successive etching and polishing a cleavage surface.
Published Online: 2010-07-28
Published in Print: 1968-08
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Articles in the same Issue
- Inclined dislocations in apophyllite crystals
- Oriented transformation of lithiophorite
- Refraktionsmodifizierte Braggsche Beugung bei asymmetrischer Durchstrahl-Reflexion
- Notes on the size of transition-metal atoms
- Crystal structure of cadmium mercuric thiocyanate, CdHg(SCN)4
- Product of the normalized intensities in a test for isomorphism using higher moments of intensities*
- The unit cell of gaylussite
- The crystal structures and infra-red spectra of barium and strontium nitrates
- A comparison of some weighted Fourier syntheses with the summation method for vector convergence
- A modification to Patterson syntheses
- Verfeinerung der Struktur des Zinkhydroxidchlorids II, Zn5(OH)8Cl2 · 1H2O
- The Z expansion of the atomic scattering factor for the helium sequence*
- The crystal structure of vauquelinite and the relationships to fornacite
- The study of polytypism in silicon carbide by x-ray diffraction topography
- The neutron-scattering amplitude of potassium
- Errata: Refinement of the structure of scandium sesquioxide
